@article{MZ_1978__163_172750,
     author = {Peter Schmid},
     title = {Group {Extensions} and {Splitting} {Modules.}},
     journal = {Mathematische Zeitschrift},
     pages = {177--186},
     publisher = {mathdoc},
     volume = {163},
     year = {1978},
     zbl = {0373.20042},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__163_172750/}
}